/**
 * Copyright [2012-2013] [Guðmundur Björn Birkisson]
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. Copyright [2012-2013] [Guðmundur Björn Birkisson]
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * ---------------------------------------------------------------------------
 * 
 * Class name:  VarCall
 * 
 * Description of class:
 * 
 * Concrete implementation of LangObject
 * 
 */

package karel.lang.secondpass;

import java.io.IOException;
import karel.lang.RDParser;
import karel.lang.RDParserException;

public class VarCall extends LangObject {

    protected String name;
    protected int level;
    protected int pos;
    
    public VarCall(String name, int line, int column) {
        super(line, column);
        this.name = name;
    }
    
    public void validateVarCall() throws IOException {
        Program.SearchResults res = parent.find(name, -1);
        if(res == null) {
            throw new RDParserException("Breytan '"+name+"' ekki skilgreind!",line,column,name.length());
        } else {
            level = res.level;
            pos = res.pos;
        }
    }

    @Override
    public void generate(RDParser parser) throws IOException {
        parser.asmCode.append("(Fetch ").append(level).append(" ").append(pos).append(")\n");
    }
    
}
